IPsec (Internet Protocol Security) is a protocol for securing IP communications by authenticating and encrypting each IP packet of a communication session.

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Partial VPN connections on Cisco ASA

Cisco ASA 5505 in remote site, connecting as Easy VPN client to ASA 5510 at HQ. VPN light is green, and sh crypto isakmp sa shows active security association. However connectivity to some of our ...
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66 views

Is there a way to have VPNC failover automatically to a second Cisco firewall?

I'm currently using VPNC on my Ubuntu machine to VPN to a remote Cisco firelwall. It's critical for this VPN connection to be up at all time. Is there a way to have VPNC failover automatically to a ...
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311 views

Cisco with site-to-site and EzVPN - configuration Issue

This is the first time for me to work with Cisco Router. The below mentioned is my configuration where Cisco Srv is Cisco 7200 Series Router XYZ is one VPN Server running on Linux. RAC is ...
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311 views

L2TP/IPSec Tunnel to Virtual Network Interface

How do I set up a virtual network interface in Ubuntu so that OpenSWAN will happily forward packets between a remote mobile subnet and sockets on the local virtual device? This is my infrastructure: ...
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255 views

Cisco RV220W ipsec with wrong ip packets

I just setted up a IPSEC lan to lan ipsec connection and since our local ip ranges colide with the remote network, I setted the local ip in the VPN police to be our external wan ip. The vpn tunnel is ...
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295 views

SMB over IPSec prompting for credentials

I am trying to connect our web server to customers SQL/file server through a VPN tunnel. Originally we had setup a PPTP VPN and I was able to access their file shares without issue. Since PPTP ...
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2k views

Cisco ASA - Duplicate ISAKMP SA - REKEYs

I have an issue with IPSEC VPNs where a single endpoint generates multiple ISAKMP SAs. (in my examples I have replaced the IPs - 1.1.1.1 is the remote endpoint, 10.10.10.10 is an object on the remote ...
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1k views

IPSec VPN login failing with certificate authentication

I am working on an IPSec VPN solution allowing iPhones / iPads to connect to a Linux server running Gentoo. I have been able to get the VPN functioning as expected using PSK authentication (PSK + ...
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344 views

ipsec tunnel connectivity issue

I trying to connect Solaris 10 box to Cisco PIX with IPsec tunnel. And it seem halt at some point. And from the post @ http://www.mail-archive.com/networking-discuss@opensolaris.org/msg07573.html ...
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1k views

Openswan Ubuntu Malformed Packet

I'm trying to create an IPSec encrypted VPN tunnel to a Cisco ASA 5540 from a ubuntu server using openswan. I've set up VPN connections before to Cisco routers, so this task didn't seem like it would ...
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489 views

How to allow RDP through IPSEC using netsh advfirewall command

I have an offsite windows server 2008 R2 server. And an ipsec tunnel set on our router here plus a connection security rule in Advanced Firewall on the server. I have ssh access to the console on the ...
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239 views

Trouble connecting my server to a firefwall trough VPN

I have a server running Ubuntu and Openswan, but I'm not able to connect to the remote firewall. I hope that anybody can help me. My ipsec.conf-file is as follows: config setup protostack=netkey ...
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455 views

IPsec tunnels between Linux and Solaris

I have a Solaris machine sitting out in the ether somewhere that I would like to make part of my network via IPsec. I have this working between Solaris machines but not between Solaris and Linux. I ...
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140 views

Windows IPSec Filter Sanity Check

I'm installing NSClient++ so our Nagios system can monitor some windows servers using NRPE. I need to punch a hole in our IPSec policy to allow inbound connections on port 5666 from the Nagios server. ...
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873 views

StrongSwan - Windows 7 0 IPSec IKEv2 connection problems

I am trying to configure a roadwarrior scenario between a linux box with StrongSwan and a Windows Box with Agile VPN. I successfully configured my StrongSwan and my Windows box to connect. The Windows ...
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8 views

How to configure strongswan to support iOS mobile devices?

I'm trying to configure strongswan server to support iPhones and iPads. I'm using client certificate for authentication, I have the following configuration for iOS in strongswan.conf : conn iOS ...
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10 views

Domain controller not allowing me to connect to it over IPSec tunnel

I'm trying to connect a Windows 7 computer to a domain controller over an IPSec tunnel. The tunnel has formed and the network is accessible. I have set the IPSec connection to use the windows domain ...
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8 views

Tagged traffic over Checkpoint IPSec

How can I forward tagged traffic over Checkpoint IPSec? Where I can read more info about it? I have Checkpoint R76 and I need to use tagged vlan over IPSec tunnel.
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11 views

Issue with SNAT and IPsec

Hi I am having issues with an IPsec connection I have, the connection is established this is the output of ipsec whack --status 000 #17: "connection/0x1":500 STATE_QUICK_I2 (sent QI2, IPsec SA ...
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18 views

Ipsec right side multiple ip's and phases lifetimes

This is my setup for ipsec: conn outside_company authby=secret ike=aes256-sha1;dh2 phase2=esp phase2alg=aes256-sha1;dh2 pfs=yes keyingtries=3 ikelifetime=24h ...
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24 views

vpnc: no response from target

I have not be able to for a tunnel using vpnc or shrew soft to my pfsense box running IPSec. I have made sure that the correct ports are open, the user I'm trying to log in has the correct permissions ...
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18 views

Openswan not updating the routing table

I have problems to find solution about this. I have Openswan and ASA configure IPSec VPN tunnel and the connections is established and working but with some little problems. The topology is looking ...
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76 views

IPSEC VPN with same remote peer IP - Only 1 remote connection at a time

I am using a Mikrotik router to connect multiple road warriors (Avaya phones) with IPSEC VPN behind the same WAN address. The first phone connects fine, when the second phone connects the first phone ...
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129 views

OpenSwan IPsec connection drops after 30 seconds

I'm trying to connect from my Linux Mint 16 box to a CloudStack server through IPsec L2TP. Building up the connection works (pings work across the tunnel). However 30 seconds later the IPsec tunnel ...
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63 views

IpSec/Racoon: Packets go to wrong tunnel

I use Debian and Racoon to connect to a Cisco VPN Gateway. We have got two tunnels between the same endpoints. Somehow and sometimes, packets go to the wrong tunnel. This is the log message from the ...
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73 views

Linux IPSec, association established but no traffic

We are attempting to setup an IPSec tunnel from a Debian firewall/router to a Netasq hardware firewall. On the Debian side the tools used are IPSec-tools and Racoon. The IPSec SA is established ...
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64 views

openswan slow initial iperf tests

I have some working tunnel servers and although they appear to work, I'm concerned about the results of some performance tests I've been performing. The results look much like this: ...
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265 views

Multiple Windows clients behind a same NAT gateway cannot connect to L2TP/IPsec VPN server at the same time

I have set up a L2TP/IPsec VPN server on a cloud VM (with a public IP address) running CentOS 6.5 (kernel: 2.6.32) with openswan/xl2tpd (openswan: 2.6.37, xl2tpd: 1.3.6). However, if multiple Windows ...
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695 views

Cannot connect to IPSEC/L2TP VPN Arch Linux/Windows 8

I have check a lot of other L2TP/IPsec VPN post and none of them seem to quite match the issues I am having so here is what going on. I am trying to set up a VPN on my Arch Linux server that I can ...
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126 views

Cisco ASA 5505: PAT / NAT between 2 IPSec Tunnels

I've the following Setup: Customer <-> HQ <-> Branchoffice The Customer has a 192.168.1.0/24 subnet. On the HQ only the VPN Gateway is in my context, 172.20.10.1 . And on the Branchoffice ...
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74 views

vServer: Configuring single (/128) assigned IPv6 addresses for use as IP address pool for IPSEC (Strongswan) road warriors

I've a new (dev) vServer up and running. Unfortunately the provider only hands out single IPv6 addresses (not even /64 subnets). Now I am a bit confused how to achieve the following: I want to use ...
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154 views

Windows 2008 R2 site-to-site IPSEC tunnel with Juniper: tunnel up but packets are lost

I am stuck on this task almost for 2 days. Organized a site-to-site IPSEC tunnel between Juniper and Windows2008R2 machine (let's call it W2008R2 for reference). W2008R2 is a multihomed machine (2 ...
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155 views

IpSec: racoon-tool does not allow to specify key size (AES 256 bit required)

I try to use racoon-tool to configure a IPSec tunnel. The foreign gateway requires me to use AES 256 bit encryption. Unfortunately, racoon-tool only allows me to give "aes" as an option. The handshake ...
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216 views

Openswan sessions hanging with multi user VPN configuration (ipsec/l2tpd)

I've got a linux box running openswan and xl2tpd. It's a simple configuration with multiple users connecting using a sharedKey, and then establishing an L2TP connection with PPPD providing the ...
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100 views

Openswan is not restaring

I am configuring new ip-address in configuration file /etc/ipsec.conf & restarting Openswan. But, It struck & not started. Here is my logs: Apr 26 18:02:16 (none) authpriv.warn pluto[11631]: ...
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1k views

IPsec Xauth RSA - Debian 7 and Android 4.4 VPN (Always-ON) and Mac OS X 10.9.2 VPN (On Demand)

I successfully installed IPSec Xauth RSA using this instruction: http://jsharkey.org/blog/2012/09/22/deploying-a-pure-ipsec-pki-vpn-server-for-android-devices/ In brief: apt-get install ipsec-tools ...
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201 views

How to set up ipsec esp tunnel between two linux host machine using ip xfrm

I have created a ESP tunnel using ip xfrm command between two linux machine such that if I ping from one machine to other then I am seeing ESP packets. Now what I am trying to do is that I have three ...
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492 views

Is it possible to configure L2TP IPSec connection on a Fortigate 30D?

We've got a FortiGate-30D running v5.0,build4225,130521 (GA). I've managed to configure Cisco IPsec VPN and Web-SSL, and tested both, but I'm unable to configure the L2TP IPSec VPN. Looking at the ...
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257 views

OpenSwan VPN Connected but can't ping or connect to anything on right side

On my end is an Ubuntu AWS EC2 VM and on the other end is a Cisco ASA 5500 router. Phase 1 and Phase 2 come up but I cannot access anything on the other end. It would seem there's a routing problem, ...
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32 views

Can't identify IPSec policy OIDs for Cisco

I'm trying to identify the OIDs of Cisco IPSec tunnel/policy information. Specifically, I would like: the local and remote tunnel addresses (where the tunnel endpoint addresses), the local and ...
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41 views

Identifying IPSec OIDs for Quagga routers

I'm trying to retrieve the IPSec Policy information (output of "setkey -D and setkey -DP" commands) from Quagga/Linux routers, and am unable to find them. Some notes from my attempts at finding it: ...
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94 views

Site-to-Site VPN not connecting with Cisco 877

I can't seem to get the VPN connection going with my 877. I have an old IOS (12.4) but it looks to me like all the pieces are there. I have compared this config against the Azure-provided (albeit ...
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235 views

Site to site IPSec VPN between Server 2012 and USG 50

I am looking to setup an IPSec VPN server in our organisation using a Windows server 2012 machine with remote access and routing installed. I would then like to perform a site to site IPSec VPN ...
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203 views

Debugging IPSEC log

A Fortigate unit and a Openswan based Linux server. Tunnel is up but no data goes through. This is the log from the Forti unit: Line 204: ike 0:Brazil_VPN:2803378:19809969: responder received first ...
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465 views

Fortigate VPN can't reach site

I've two Fortigate's here and I use one of them for each site. Site A Site B 192.168.2.0/24 <---------- VPN ...
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75 views

Need help troubleshooting QuickVPN hang

have QuickVPN 1.4.0.5 on XP Pro SP3 and am trying to connect to a RVS4000 using its public IP address. QuickVPN gets to "Connecting..." and hangs. The context menu on the systray icon won't come ...
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132 views

StrongSwan / IKE: port 500 packets lost

I have got problems setting up a StrongSwan IpSec network. I use arno-iptables-firewall with the IpSec module and have added rules for NAT and to the routing table. When pinging a host in the remote ...
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405 views

iPhone fails to connect to Openswan IPSec

An iPhone client fails to connect to a IPSec VPN powered by Openswan on Debian with xl2tpd and ppp. The iPhone itself keeps telling after some time "Server not responding" and /var/log/auth.log says ...
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482 views

Route all traffic through IPSec VPN with ZyWALL USG 100 and OpenSwan

i want to route all traffic from our ZyWALL USG 100 through an IPSec tunnel. I was able to establish a connection from the ZyWALL, but now i have no idea how i can route the traffic through the ...
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370 views

l2tp vpn is disconnected after few minutes

I installed IPSec/L2TP on my vps server. I tried to connect from my mac to this VPN server. First time, connection is succeeded. But after a few minutes, connection was broken by itself. After ...